Throughout the world, Sainun (Sainun 
, ไซนุน ) is a rare epicene first name. The first name Sainun is characteristic of Thailand, where it is a rare largely female, but seldom male name, Indonesia, where it is a very rare male name, and India, where it is an extremely rare predominantly female, but scarcely boy's name. Likewise, Sainun is the last name as well as the forename.